Lasers ♦ news digest
Hall sensors for operation at high temperatures and in harsh radiation environments.
A potential application included imaging of ferromagnetic domains at the surface of permanent magnetics. Adarsh Sandhu, a lead researcher at Electronics Inspired Interdisciplinary Research Institute, based in Japan, has previously demonstrated the imaging of magnetic domains in ferromagnetic materials with an AlGaN / GaN micro-Hall sensor in a high temperature scanning Hall probe
Optical image of 5µm2×5µm2AlGaN / GaN Hall sensor
Temperature dependence of current-related magnetic sensitivity What’s more, the electron mobility and two dimensional electron density of the AlGaN / GaN micro-Hall sensors were only slightly affected by a 1x1013cm-2 proton dose at 380 keV.
microscope (SHPM). SHPM images of a bismuth substituted iron garnet thin films at 25–100 °C under an external perpendicular magnetic field Hextof 150 Oe
Further details of this research will be available soon in the paper, “High Temperature Hall sensors using AlGaN/GaN HEMT Structures”, by S. Koide et al, Institute of Physics Journal of Physics Conference Series (
http://iopscience.iop. org/1742-6596) (in press).
Ferdinand-Braun-Institut
honoured with Transfer Prize The team from the FBH has been awarded for the transfer of its powerful diode laser technology used for materials processing, into a manufacturing environment
Variation of Hall voltage with magnetic field with drive current for an AlGaN/GaN Hall sensor before and after irradiation with proton fluence of 1014cm-2
The researchers are actively seeking industrial partners to exploit the robust properties of the 2DEG-AlGaN/GaN 2DEG
At the opening evening of the Laser Optics Berlin trade fair which began on March 19th, 2012, a team from Ferdinand- Braun-Institut was awarded with the Transfer Prize WissensWerte 2011.
In this field, the Ferdinand-Braun-Institut (FBH) closely cooperates with Jenoptik Diode Lab GmbH, a spin off from the institute. Founded in 2002, the company runs a semiconductor
April/May 2012
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